# NousResearch/hermes-agent · ACP session handling during compression rotation

## Open now

- 1 issue, 1 PR open on GitHub.
- #49226: ACP session ids can be stranded after automatic compression rotation
- PR #88364: fix(acp): keep compaction on the client session

These members address bugs and behavior changes related to ACP session IDs and compaction being disrupted or stranded during automatic compression rotation. Includes a related compression in-place default flip and guard fix.

## TL;DR

- 5 member(s): 1 open issue(s), 0 closed issue(s), 1 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #52658. Verify it addresses your case.
- **Recommended:** read PR #52658 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.40`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Open related issues

- #49226: ACP session ids can be stranded after automatic compression rotation

## Prior & competing PRs

- **#52658: feat(compression): flip in_place default to True + guard fix (#38763) \[salvage #51959\]**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `gateway/run.py`, `gateway/slash_commands.py`, `hermes_cli/config.py`, `scripts/release.py`, `tests/agent/test_compression_concurrent_fork.py`, `tests/agent/test_compression_logging_session_context.py`, `tests/agent/test_compression_rotation_state.py`, `tests/gateway/test_compression_concurrent_sessions.py`, `tests/gateway/test_session_hygiene.py`, `tests/run_agent/test_compression_boundary_hook.py`, `tests/run_agent/test_in_place_compaction.py`
- **#49233: fix(acp): resolve compression-rotated session ids**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `34023ed10518e25dcd1d4ff42fcf585498eaa656`, `#52658`, `#51959`, `#49233`
- **#88364: fix(acp): keep compaction on the client session**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#110763`
  - files: `acp_adapter/commands.py`, `acp_adapter/session.py`, `contributors/emails/[redacted:email]`, `tests/acp/test_server.py`, `tests/acp/test_session.py`
- **#110763: fix(acp): make manual compression durable**. closed without merge
  - maintainer direction: category `silent_close`; implication `active`

## Fix status

- Merged to main in PR #52658 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-06-25`.
- Subsystem: `acp`